Use of a back support belt is a must during lashing and de-lashing operations and the crew should be cautious while walking around the ship as the vessel's structure could lead to a tripping hazard. It is also important for crewmembers o understand the plan and order of the lashing and unlashing operation. It be kept in mind that reefer containers always require more attention an o-ordination for plugging and unplugging during loading or unloading operations.